+150 is American odds for an underdog. A $100 bet wins $150 in profit (you also get your $100 stake back). The implied probability is about 40% — the sportsbook is pricing this side as a 4-in-10 chance to win.
The number itself
American odds use a + or − to flag the underdog and favorite. A positive number like +150 means the side is the underdog — the sportsbook thinks it's less likely to win. The bigger the positive number, the bigger the underdog.
The number itself tells you the profit on a $100 winning bet. +150 means $150 profit on $100 risked. +250 means $250 profit on $100 risked. +500 is $500 profit on $100, and so on.
The payout math
The formula for any positive American number:
Profit = stake × (odds / 100)
So +150 at any stake:
- $10 stake → $10 × 1.50 = $15 profit ($25 total payout)
- $25 stake → $25 × 1.50 = $37.50 profit ($62.50 total)
- $50 stake → $50 × 1.50 = $75 profit ($125 total)
- $100 stake → $100 × 1.50 = $150 profit ($250 total)
You can punch any of these into the bet calculator to verify.
What +150 implies about probability
Every odds number contains a probability estimate. The formula for a positive American number:
Implied probability = 100 / (odds + 100)
For +150: 100 / (150 + 100) = 100 / 250 = 40%.
That's the sportsbook's pricing — not the true probability. The book bakes its commission (the vig) into every line, so the implied probability is usually a bit higher than the "fair" probability. To back the vig out, you'd need the price of the other side too. See how to remove vig from odds for the math.
When you'll see +150
+150 shows up on moneylines for moderate underdogs in major sports. A college football team getting 7 points might be a +150 underdog on the moneyline. A 6-seed against a 3-seed in March Madness often lands somewhere near +150 to +180.
You'll also see +150 on player props, futures (with a wider range of numbers), and as a leg in a multi-leg parlay. In a parlay, each leg's decimal odds multiply together, so a +150 leg contributes a factor of 2.50 to the total payout. Combine three +150 legs and you get 2.50 × 2.50 × 2.50 = 15.625× your stake — a $10 ticket pays $156.25.
+150 in other odds formats
- Decimal: 2.50 — multiply your stake by 2.50 for total payout.
- Fractional: 3/2 — for every 2 units you risk, you profit 3.
- Implied probability: 40%.
All four formats describe the same bet — they're just different conventions. UK and Irish books use fractional. European books use decimal. US books use American. The quick converter on the homepage turns any format into the others instantly.